Driving mechanism for flat knitting frames



Feb. 28, 1933- K. K. LIEBERKNECHT DRIVING MECHANISM FOR FLAT KNITTINGFRAMES Filed Nov. 29, 1930 /n venfor: 41.64 W

Patented Feb. 28, 1933.

marmos- .1. B081, 01' OBEBLUNGWITZ, exam! DmG FOB In! KNITTINGApplication fled Iovember 88, 1980, lerlal Io. 499,055, and in GermanyDecember 4, 1989.

5 in combinatio'IW'with a slip clutch and two jaw clutches on a maindrive shaft, a secondary countershaft "connected to the main shaft byreducing gearing of a relatively large ratio, so as to ermit the maindrive 10 shaft to be driven dlrectly from the drive motor, or indirectlythrough the reduction gearin By this arran ement the advantage isobtalned that for wor ing at normal speed, an engagin of the drivinshaft free from 15 shocks resu ts and that, w en working with reduced seed, i. e. through the intermediary of the redhcingcaring, an additionalcontrolling of this 50w speed is possible for a further reduction downto zero, i. e. to the 3 stopping of the driving shaft, although themotoris running.

An embodiment of the invention is illustrated diagrammatically by way ofexample in the accompanying drawing in which 25 Fig. 1 shows, partly insection, a front elevation of the driving mechanism.

Fig. 2 is a corresponding part end elevation of the slipping clutch,viewed from the right. rom an electric motor 1 or from any othersuitable source of power a ulley 4 is driven by a pulley 2 through theintermediary of a belt 3, which pulley4 is loosely mounted on the mainshaft 5 and arranged either in the middleof the frame or on one of thesides of the same. The driving shaft 5 drives .the cam.

shaft in lmown manner through the intermediary of pairs of gear wheels,arranged on both sides of the rame, these elements not being shown inthe drawing.

. The pulley 4 has a cavity 6 in which a pin 7 is fixed in'axialdirection on the body of the pulley. To this pin 7 a friction band 8 isattached, which is placed around a drum 9 keyed on a sleeve 10, whichcarries the pulley 4. This sleeve 10 runs loosely on the driving shaft 5and is fitted on each end with a claw clutch 12, the other halves 13 ofwhich claw clutches are fitted 'on the end faces 50 of slidable sleeves14 and 15 respectively.

The sliding sleeve 14is shiftably mounted on the shaft 5 by means of akey or feather 16. This slidable sleeve 14 has a groove 17 in itscircumference with which en ages the bifurcated end of an arm 18.keye ona short rod 20 shiftable in bearings 19 of the knitting machine frame.An adjusting handle 21 is fixed on the rod 20 .which also carries on itspro ectin right hand end an arm 22, the bifurcate other end of whichengages with the circumferential groove 23 of the slidable sleeve 15.The slidable sleeve 15 carries between the gortion having thecircumferential groove an its end face fitted with the half 13 of theclaw clutch, a gear 24 meshing with a narrower spur wheel 25 of asecondary countershaft' 26. This secondary countershaft is journalled inbearings 27 of the frame and carries further a pinion 28 meshing with aspur wheel 29 keyed on the driving shaft 5. This back gearing may beotherwise constructed, for lnstance as reducing gearing, but itworks-preferably with a transmission ratio of 1:10.

The operation of the driving mechanism described is as follows If thehandle 21 is pushed to the right, the rod 20 is shifted to the right sothat the left hand clutch elements 13 and 12 are engaged with eachother, the machine running during the knitting of plain rows at normalspeed, about to revolutions of the cam shaft. Owing to the interpositionof the slipping clutch 7, 8, 9, 10, the engaging of the clutch iseffected almost free from shocks. The elements of the driving mechanismare returned into the normal position shown in Fig. 1 by pushing thehandle 21 to the left into its initial position. If the handle 21 ispushed to the left from the normal position, the right hand clutchelements 13 and 12 are engaged also free from shocks. Themovements ofthe driving belt 3 are now transmitted upon the shaft 5 through thegearing 24, 25, 28 and 29. This considerably reduced speed ofapproximately only 4 to 8 revolutions per minute permits of accuratelyob serving operations at certaintimes and, if

necessary, of disengaging at the correct time,

or the clutch. It is therefore possible for the knitter to carry throughan accurate con trol of the frame when the motor is running and to stopthe frame accurately at any desired point similarly to when workingexclusively by hand as heretofore. The slipping clutch may have anyother suitable construction than that shown by way of example in thedrawing.

I claim V 1. A drive for flat knitting machines comrising in combinationwith a motor, a drivmg shaft driven by said motor, a rotatablenon-shiftable sleeve arranged on said driving shaft, coupling teeth onboth end faces of said sleeve, a dr'um keyed on said sleeve, a beltulley loosely mounted on said sleeve, a frict1on band carried by thepulley and exciated cou lin sleeve, a drum attached to said rotata leeeve, means connected to said rotatable sleeve and having a cavity, afriction band fixed on a pin in the cavity of said means and extendingover said drum, and means on said driving shaft for additional handbraking said driving shaft for reducing its speed down to a standstillduring the :drive of said motor.

In testimony whereof I aflix my signature.

KARL KLAUS LIEBERKNECHT.

tending over said drum, a coupling sleeve shiftably splined on saiddriving shaft adapted to be coupled to said non-shiftable sleeve at oneside thereof, to directly drive said driving shaft, a second shiftablecoupling sleeve splined on said driving shaft on the opposite side ofsaid non-shiftable sleeve, a gear carried by said second couplingsleeve, a counter-shaft, a reducing gearing including the aforesaid gearwith a transmission ratio of approximately 1:10 on said driving shaftand counter-shaft and a hand adjusting means on said driving shaftadapted to allow said driving shaft to be turned by hand for anadditional reduction of speed down to and including zero when said motoris running and said reducing gear is engaged.

2. A drive for flat knitting machines com prising in combination withthe driving motor, a driving shaft driven by said motor, a couplingsleeve slidably splined on said driving shaft, a counter-shaft extendingparallel to said driving shaft, a reduction gearing mounted partly onsaid driving shaft and partly on said parallel counter-shaft, said gearng allowing a transmission ratio of approximately 1:10, a secondcoupling sleeve shiftably splined on said driving shaft, an element ofthe reduction gearing carried by said second sleeve, a non-shiftablerotatable sleeve mounted on said driving shaft between.

said coupling sleeves, connecting parts between the first named couplingsleeve and said element of said reduction gearing for alternatelyshifting the gear element and asso-

